Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 52, NWS Grand Forks, ND

August 12, 1994Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 12, 1994, 11:08 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 37 min.

The area

The counties it named.

The facts

Issued: Aug 12, 1994, 11:08 PM CDT (04:08 UTC)
Expired: Aug 12, 1994, 11:45 PM CDT
In force: 37 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Lake of the Woods County, MN, Roseau County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 4.1 hours before the alert went out and 153 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 907 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 12, 7:40 PM CDT, 3 hours 28 minutes before

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Local storm report, Aug 12, 9:30 PM CDT, 1 hour 38 minutes before

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</head>
<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Local storm report, Aug 12, 9:31 PM CDT, 1 hour 37 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
930 PM CDT FRI AUG 12 1994

TIME          EVENT
730 PM CDT    OBSERVER AT MONTPELIER ND...STUTSMAN COUNTY REPORTED
              GOLF BALL SIZED HAIL AND VERY HEAVY RAIN.
745 PM CDT    OBSERVER AT LITCHVILLE ND...BARNES COUNTY REPORTED
              PEA SIZED HAIL...CONTINOUS LIGHTNING AND VERY HEAVY
              RAIN.
810 PM CDT    BARNES COUNTY SHERIFFS OFFICE REPORTED PEA SIZED HAIL
              AND VERY HEAVY RAIN...6 MILES SOUTH OF VALLEY CITY ND.
820 PM CDT    STATE RADIO REPORTED GOLF BALL SIZED HAIL 12 MILES SOUTH
              OF VALLEY CITY ND...BARNES COUNTY.
ANDERSEN

Local storm report, Aug 12, 10:05 PM CDT, 1 hour 3 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1005 PM CDT FRI AUG 12 1994

TIME          EVENT
730 PM CDT    LATE REPORT...REPORT FROM 3 MILES WEST OF GWINNER NORTH
              DAKOTA...SARGENT COUNTY...1/2 INCH HAIL...30-40 MPH WIND
              AND 0 VISIBILITY IN TORRENTIAL RAIN.
ANDERSEN

Special weather statement, Aug 12, 10:35 PM CDT, 33 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-130435-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1035 PM CDT FRI AUG 12 1994

...STRONG THUNDERSTORMS WERE MOVING INTO NORTHEAST NORTH DAKOTA AND
   NORTHWEST MINNESOTA...

AT 1025 PM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN
WERE PUSHING INTO PARTS OF NORTHEAST NORTH DAKOTA AND NORTHWEST
MINNESOTA. MOST OF THESE THUNDERSTORMS EXTENDED FROM NEAR THE CANADIAN
BORDER IN EXTREME NORTHWEST MINNESOTA...SOUTHWEST INTO NORTHEAST NORTH
DAKOTA NORTH OF DEVILS LAKE.

ANOTHER THUNDERSTORM WHICH CONTAINED VERY HEAVY RAIN WAS BETWEEN DETROIT
LAKES AND MAHNOMEN IN NORTHWEST MINNESOTA. OTHER THUNDERSTORMS WERE
BETWEEN BEMIDJI AND FOSSTON OVER NORTHWEST MINNESOTA.

THESE THUNDERSTORMS WERE MOVING RAPIDLY SOUTHEAST AT 40 TO 45 MILES AN
HOUR AND WILL LIKELY CONTINUE TO PUSH SOUTHEAST ACROSS NORTHEAST
NORTH DAKOTA AND NORTHWEST MINNESOTA THROUGH MIDNIGHT.

ALONG WITH VERY HEAVY RAIN...THESE THUNDERSTORMS MAY ALSO PRODUCE
SMALL HAIL...STRONG GUSTY WINDS...ALONG WITH DEADLY LIGHTNING.

PERSONS OVER NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA SHOULD
REMAIN ALERT AND STAY TUNED FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.
SPIES

Special weather statement, Aug 12, 10:38 PM CDT, 30 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-130435-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1035 PM CDT FRI AUG 12 1994

...STRONG THUNDERSTORMS WERE MOVING INTO NORTHEAST NORTH DAKOTA AND
   NORTHWEST MINNESOTA...

AT 1025 PM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN
WERE PUSHING INTO PARTS OF NORTHEAST NORTH DAKOTA AND NORTHWEST
MINNESOTA. MOST OF THESE THUNDERSTORMS EXTENDED FROM NEAR THE CANADIAN
BORDER IN EXTREME NORTHWEST MINNESOTA...SOUTHWEST INTO NORTHEAST NORTH
DAKOTA NORTH OF DEVILS LAKE.

ANOTHER THUNDERSTORM WHICH CONTAINED VERY HEAVY RAIN WAS BETWEEN DETROIT
LAKES AND MAHNOMEN IN NORTHWEST MINNESOTA. OTHER THUNDERSTORMS WERE
BETWEEN BEMIDJI AND FOSSTON OVER NORTHWEST MINNESOTA.

THESE THUNDERSTORMS WERE MOVING RAPIDLY SOUTHEAST AT 40 TO 45 MILES AN
HOUR AND WILL LIKELY CONTINUE TO PUSH SOUTHEAST ACROSS NORTHEAST
NORTH DAKOTA AND NORTHWEST MINNESOTA THROUGH MIDNIGHT.

ALONG WITH VERY HEAVY RAIN...THESE THUNDERSTORMS MAY ALSO PRODUCE
SMALL HAIL...STRONG GUSTY WINDS...ALONG WITH DEADLY LIGHTNING.

PERSONS OVER NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA SHOULD
REMAIN ALERT AND STAY TUNED FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.
SPIES

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 13, 12:02 AM CDT	Severe Thunderstorm Warning	FGF	Polk	58 min
Aug 13, 12:54 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	66 min
Aug 13, 1:59 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	61 min
Aug 13, 3:54 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	41 min
Aug 13, 3:54 AM CDT	Severe Thunderstorm Warning	FGF	Douglas	66 min
Aug 12, 8:27 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	63 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994 Every severe thunderstorm warning in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.